Gangnam

People perform a Gangnam style dance during a flash mob before the arrival of South Korean rapper Psy in Moscow...People perform a Gangnam style dance during a flash mob before the arrival of South Korean rapper Psy at the Olympiyskiy (Olympic) sports and entertainment complex in Moscow, June 6, 2013. Psy is in Moscow to take part in the MUZ-TV music awards ceremony on June 7, according to local media. REUTERS/Tatyana Makeyeva (RUSSIA  - Tags: ENTERTAINMENT SOCIETY)

Tatyana Makeyeva/Reuters

Russians perform a Gangnam-style dance during a flash mob before the arrival of South Korean rapper Psy at the Olympiyskiy (Olympic) sports and entertainment complex in Moscow on Thursday.